Coffee roaster



J. D. WEATHVERSBY 1,742,978

Original Filed June 29, 1927 INVENTOR ATTORNEY Jan 7, 1930. J. D. WE IATH'ERSBY 1,742,978

COFFEE ROASTER Original Filed June 29, 1927 5 Sheets-Sheet 2 itili aikzeray M ATTOR N EY Jan. 7; 1930. J. D. WEATHERSBY 1,742,973

COFFEE ROASTER I Original Filed June 29, 1527 5 Shuts-Sheet 5 lNVENTOR AITORNEY Patented Jan. 7, 1930 JEFF D. WE'A THERSBY,"OF NEW ORLEANS; LOUISIANA COFFEE BOASTER' j l Ite'fil'ed'for abandoned application; Serial-No. 202,414, filed June 29,. 1927; Ellis-application filed- Apri1 .13,- 1929. Serial No.1 354,965.

114; and which wasabandoned for failure ,to-t-pay the final fee, thegenera1 object of the present-invention"being to' provide a casing H having upper and lower cylinders therein, each provided with spirals for causing the coflee'topass back --and -,forthi inthecylo indersywith -means for heating the lower.-

cylinder to roastthe' cofiee therein and with means for preheating: the cofiee in the-upper cylinder from the heated air: passing through the lowercylinder, said upper-cyh "inder-actingi to. cleanthecofiee of trash and the likeso thatvthe colfee in this cy-linden is cleaned and heated before being passed to; the w a 11.. The members,and-theirnspirals are so...

arranged that-the .colfeegiscaused tomove back and "forth r in the cylinder, as the same' lower cylinderv where itis roasted.

Another obj'ectof the invention is to pro- ;vide a tray for catching the trash and-the likes droppingsfrom :the upper cylinder; said tray."beingsovarranged that the trash' will 5 not be burnedand therefore .preventthe coffee being injured by thefumesfrom the trash 2 as it would-ifthe trash; were burned.

A still further objectof the invention is to provide means for carrying off steam and the like ifromnthe roasting :cylinder when the roasting has been checked byspraying .the beans with water andto prevent these vapors fromcoming in contact withthecofl'ee in the uppercylinder.

This inventionalso consistsin certain other features of construction and in the -combina-. tionr and 'arrangement 'of the several-.parts to be hereinafterafully described, illustrated in the accompanying drawings andspecifically:pointe'd out in the appended claims.

In describing the invention in detail, ref

erencezwill be hadt'o'the accompanying draw;

ings wherein like characters denote'like'or corresponding parts through the several- Figure. 5 1s a section-on line 5-5 of. Fig- 1 Figure 1 is a front view: of the apparatus.-

Figure 6 is a sectionkonzline 66 of llig v ure' 3.

In, these drawings, 1 indicates acasing inwhich is arranged the upper cylinder A and the lower cylinder B, each cylinder being-fad 5 tened to..a shaft 2 ou rnaled inthe-casingand connected together... by the chain. 3 passing. overthe sprockets 4: on the projecting; rear ends ofthe shafts. Thesha'ftlof the lowercylinder has asprocketfi thereon over vwhich passes a chain. 6 which alsopasses over a sprocket 7 on a driven shaft .8. Each-r'cyl-I inder :is composed of ..an outer..member 9. and. an. 11111611 member 10v which. are spaced apart, .the inner.memberwbeingn of. shorter lengththan the outer member. and each .mem-

berhas connected withlfitsginterior a spiralislrotated. V The rear endaof the upper cyl inderisclosedby animperforate end piece.

IZWhileItherear-end of:the lower cylinder is formed. of wiregauze: 13i The upper cylinderis composed of square wire mesh; which has a rough surface so thatuit will. remove foreign matter from-the coffee beans andpo1- ish the beans while the lower cylinder is con-,-

*structedof perforated metal; r

A partition 14: is vertically arrangedi .the casingand hasholes therein which areoccupied by the rear ends of-thezcylindersr This partitionformsa chamber. 15- at the I rear-ofthe casing with which the'lower' cylinder is 1 in communication through means of the wire mesh end 13. The casing is pro vided with inner sidewallsrl which-are spaced fromthe outer wall-and diagonally.

arranged baflle plates .16 extend downward ly from these-inner walls adjacent the lower part of the lower cylinder. Substantially 'V-shaped bafHeLmembers 17; extend inwardly from the-innerwalls adjacent the lower part of the upper cylinder and strips 18 are carried by some ofthese bafflemembers andby oneoftheinner walls ofthe'casing, these I strips extending inwardly and engaging the sides of'the' cylinders to prevent heated air. from passing around the cylindersandcaus s ing;;it toepass through: the cylinders e Burners 19 are arranged in the lower part of the casing for heating the air entering the bottom of the casing from the drum 20 arranged below the casing and a tray 21 is and a door 23 in the front of the casing per- 7 from the lower part thereof, thisair passing mits access to the tray to remove the same. An opening 24 is formed in the topof; the casing and a hood 25 covers the opening, this hood being connected by a pipe 26 with the inlet of a power driven fan 27. A branch pipe 28 connects the top of the chamber 15 with the pipe.26. A damper 29 is arranged in the pipe 26 in rear-of the junction of the pipe 28 therewith and a damper 30 is arranged in the chamber '15 for closing the lower part of the chamber from the upper part thereof. 'These dampers are connected with an operating rod 31 by the links 32 n such a manner that when the rod is moved,

one damper will be closed and the other opened. Thus the lower part of the chamber will be cut olf from the suctionof the fan when the top part of the casing is in cominunication with the fan and vice versa.

A ho per 33 is provided atthe top of the casing or delivering the coffee into the upper cylinder and coffee is fed to the hopper from hopper, the bucket conveyor beingenclosed in the casings 37 and the conveyor is driven.

from the power shaft 8 by means of the endless chain 39 passing over the sprocket 40'on the power shaft and over a sprocket41 connected with the shaft 42 journaled in the.

chute 36 and said shaft 42 has a sprocket thereon over which the conveyor passes. A 'shute 43 is arrangedto cause the coffee to pass from the. upper cylinder to thelower cylinder, this chute being providedwith the gates 44 to control the passage, of the coffee therethrough.- Gas .is led to the burners from a suitable source'of-supply through the pipes 45..

From the foregoing willebe seenthatp coffee beans placed in the receiver 34 'are lifted into the chute 36by the conveyor 35 and from this chute thebeans pass into the hopper 33 and from the hopper intot-he top cylindera As before stated, the coffee beans are caused to pass back and forth'in this cylinder so that foreign matter, is removed from them and. they are polished and theyare also pre-' heated by air passing up through the casing out through theopening 24 into the hood 25 and being 'discharge'dbythe fan through the discharge pipe 46. After't-he cofi'eebeans have been sufiiciently treated in the upper cylinder, the gates 44 are 0 ened so that the beans will pass through t e trough 43 into the lower cylinder and then a new supply of beans is placed in the upper cylinder so spirals and when the beans have been roasted to the desired degree, the rod 31 is moved to close the damper 29, thus shutting off 7 the suction at the top of the casing and opening the damper 30 so that a suction is created in the chamber 15 bythe fan. Water is then applied to the beans in the lower cylinder to check the roasting action and'all smoke, steam, etc. will be drawn from said lower cylinder into the chamber 15 and it will pass from said cylinder through the a branch 28 into pipe 26 and thus be drawn off by the fan. Thus this smoke, steam, etc. is prevented from coming'in contact with i the beans being treated in the upper cylinder.

Then the door 47 in the front of the casing is opened so, that the roasted. beans will pass from the lower cylinder and be discharged by the chute 48 into a container placed to receive them. The rod' is then actuated to close the damper 30 and open the damper 29 and then the coffee is passed from the upper cylinder intothe lower cylinder. and

a new supply of beans placedin theupper cylinder. I w Y e 7 As before stated, the trash dropping through the upper cylinder is caught inthe- .tray 21, and by positioning this trayas shown, ,there is no danger of the trash therein being burned by the heat from'the burners which would be apt to injure the coffee in the top cylinder.

As will be seen, the coffee is preheated thatsome of its moisture is removed by the.

heat used to roast the coffee in'the roasting cyllnder and the steam, due to spraying water on the roastedcoffee, is prevented from coming incontact with the beans in theupper cylinder'by causing the steam'to pass into the chamber 15 and closingthe upper'end of the casing to the suction of the fan; 7 v It 1s thought from the foregoing descrip-' tion that theadvantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the construction and in the com--: I

in the scope of the appended claims.

bination and arrangement of the several parts, provided that suchchanges fall with."

prising a casing, upper and lower cylinders" therein formed ofperforate'd material, means and forth therein, burners in the lower part of the casing for roasting the beans in the lower cylinder, the air heated by the burners passing upwardly to heat the beans in the upper cylinder, a tray for catching the waste material passing through the upper cylinder, means for causing the beans from the upper cylinder to pass into the lower cylinder when desired and discharge means for the lower cylinder.

2. A device of the class described comprising a casing, upper and lower cylinders therein formed of perforated material, means for rotating the cylinders, means for causing the beans in the cylinders to move back and forth therein, burners in the lower part of the easing for roasting the beans in the lower cylinder, the air heated by the burners passing upwardly to heat the beans in the upper cylinder, a tray for catching the waste material passing through the upper cylinder, means for causing the beans from the upper cylinder to pass into the lower cylinder when desired, discharge means for the lower cylinder, a suction device connected with the top of the casing, means for connecting said device with the interior of the lower cylinder and valve means for closing the suction to the casing and opening it to the lower cylinder and vice versa.

3. A device of the class described comprising a casing, upper and lower cylinders therein formed of perforated material, means for rotating the cylinders, means for causing the beans in the cylinders to move back and forth der, a suction device connected with the top of the casing, means for connecting said device with the interior of the lower cylinder, valve means for, closing the suction to the easing and opening it to the lower cylinder and vice versa, a hopper for delivering beans into the upper cylinder, a receiver for the beans and conveying means for conveying the beans from the receiver into the hopper.

4. A device of the class described comprising a casing, a partition vertically arranged therein and forming a cylinder chamber and a suction chamber, a suction device connected with the top of the chamber and with the top of the casing, a damper in said suction chamher, a damper in the connection between the suction device and the top of the casing,

means for closing one damper and opening the other and vice versa, an upper cylinder and a lower cylinder journaled in the casing, the rear end of the lower cylinder being perforated and arranged in an opening formed in the partition, the walls of the cylinders being formed of perforated material, spirals in the cylinders for causing beans placed therein to move back and forth as the cylinders are rotated, means for rotating the cylinders, burners at the lower part 0 the casing for roasting the beans in the lower cylinder and for heating the beans in the upper cylinder when the damper in the connecting means is open and the damper in the chamber is closed, a chute for leading the beans from the upper cylinder into the lower cylinder, a gate in said chute, and a tray located under the upper cylinder for catching the trash removed from the coffee in the upper cylinder.

In testimony whereof I aflix my signature.

JEFF D. WEATHERSBY. 

